Remove redundant case override in TreeTypeMap (#17442)

This case is handled in the same way by TreeMap.

Author: nicolasstucki

compiler/src/dotty/tools/dotc/ast/TreeTypeMap.scala

@@ -146,11 +146,6 @@ class TreeTypeMap(
           val bind1 = tmap.transformSub(bind)
           val expr1 = tmap.transform(expr)
           cpy.Labeled(labeled)(bind1, expr1)
-        case tree @ Hole(_, _, args, content, tpt) =>
-          val args1 = args.mapConserve(transform)
-          val content1 = transform(content)
-          val tpt1 = transform(tpt)
-          cpy.Hole(tree)(args = args1, content = content1, tpt = tpt1)
         case tree1 =>
           super.transform(tree1)
       }

compiler/src/dotty/tools/dotc/ast/Trees.scala

@@ -1033,16 +1033,15 @@ object Trees {
   /** Tree that replaces a level 1 splices in pickled (level 0) quotes.
    *  It is only used when picking quotes (will never be in a TASTy file).
    *
-   *  @param isTermHole If this hole is a term, otherwise it is a type hole.
+   *  @param isTerm If this hole is a term, otherwise it is a type hole.
    *  @param idx The index of the hole in it's enclosing level 0 quote.
    *  @param args The arguments of the splice to compute its content
    *  @param content Lambda that computes the content of the hole. This tree is empty when in a quote pickle.
    *  @param tpt Type of the hole
    */
-  case class Hole[+T <: Untyped](isTermHole: Boolean, idx: Int, args: List[Tree[T]], content: Tree[T], tpt: Tree[T])(implicit @constructorOnly src: SourceFile) extends Tree[T] {
+  case class Hole[+T <: Untyped](override val isTerm: Boolean, idx: Int, args: List[Tree[T]], content: Tree[T], tpt: Tree[T])(implicit @constructorOnly src: SourceFile) extends Tree[T] {
     type ThisTree[+T <: Untyped] <: Hole[T]
-    override def isTerm: Boolean = isTermHole
-    override def isType: Boolean = !isTermHole
+    override def isType: Boolean = !isTerm
   }
 
   def flatten[T <: Untyped](trees: List[Tree[T]]): List[Tree[T]] = {
@@ -1563,8 +1562,8 @@ object Trees {
               cpy.Quote(tree)(transform(body)(using quoteContext))
             case tree @ Splice(expr) =>
               cpy.Splice(tree)(transform(expr)(using spliceContext))
-            case tree @ Hole(_, _, args, content, tpt) =>
-              cpy.Hole(tree)(args = transform(args), content = transform(content), tpt = transform(tpt))
+            case tree @ Hole(isTerm, idx, args, content, tpt) =>
+              cpy.Hole(tree)(isTerm, idx, transform(args), transform(content), transform(tpt))
             case _ =>
               transformMoreCases(tree)
           }

compiler/src/dotty/tools/dotc/ast/tpd.scala

@@ -397,8 +397,8 @@ object tpd extends Trees.Instance[Type] with TypedTreeInfo {
   def Throw(expr: Tree)(using Context): Tree =
     ref(defn.throwMethod).appliedTo(expr)
 
-  def Hole(isTermHole: Boolean, idx: Int, args: List[Tree], content: Tree, tpt: Tree)(using Context): Hole =
-    ta.assignType(untpd.Hole(isTermHole, idx, args, content, tpt), tpt)
+  def Hole(isTerm: Boolean, idx: Int, args: List[Tree], content: Tree, tpt: Tree)(using Context): Hole =
+    ta.assignType(untpd.Hole(isTerm, idx, args, content, tpt), tpt)
 
   // ------ Making references ------------------------------------------------------
 

compiler/src/dotty/tools/dotc/ast/untpd.scala

@@ -424,7 +424,7 @@ object untpd extends Trees.Instance[Untyped] with UntypedTreeInfo {
   def Export(expr: Tree, selectors: List[ImportSelector])(implicit src: SourceFile): Export = new Export(expr, selectors)
   def PackageDef(pid: RefTree, stats: List[Tree])(implicit src: SourceFile): PackageDef = new PackageDef(pid, stats)
   def Annotated(arg: Tree, annot: Tree)(implicit src: SourceFile): Annotated = new Annotated(arg, annot)
-  def Hole(isTermHole: Boolean, idx: Int, args: List[Tree], content: Tree, tpt: Tree)(implicit src: SourceFile): Hole = new Hole(isTermHole, idx, args, content, tpt)
+  def Hole(isTerm: Boolean, idx: Int, args: List[Tree], content: Tree, tpt: Tree)(implicit src: SourceFile): Hole = new Hole(isTerm, idx, args, content, tpt)
 
   // ------ Additional creation methods for untyped only -----------------
 

compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala

@@ -724,8 +724,8 @@ class RefinedPrinter(_ctx: Context) extends PlainPrinter(_ctx) {
       case Splice(expr) =>
         val spliceTypeText = (keywordStr("[") ~ toTextGlobal(tree.typeOpt) ~ keywordStr("]")).provided(printDebug && tree.typeOpt.exists)
         keywordStr("$") ~ spliceTypeText ~ keywordStr("{") ~ toTextGlobal(expr) ~ keywordStr("}")
-      case Hole(isTermHole, idx, args, content, tpt) =>
-        val (prefix, postfix) = if isTermHole then ("{{{", "}}}") else ("[[[", "]]]")
+      case Hole(isTerm, idx, args, content, tpt) =>
+        val (prefix, postfix) = if isTerm then ("{{{", "}}}") else ("[[[", "]]]")
         val argsText = toTextGlobal(args, ", ")
         val contentText = toTextGlobal(content)
         val tptText = toTextGlobal(tpt)

compiler/src/dotty/tools/dotc/quoted/PickledQuotes.scala

@@ -100,9 +100,9 @@ object PickledQuotes {
   private def spliceTerms(tree: Tree, typeHole: TypeHole, termHole: ExprHole)(using Context): Tree = {
     def evaluateHoles = new TreeMap {
       override def transform(tree: tpd.Tree)(using Context): tpd.Tree = tree match {
-        case Hole(isTermHole, idx, args, _, _) =>
+        case Hole(isTerm, idx, args, _, _) =>
           inContext(SpliceScope.contextWithNewSpliceScope(tree.sourcePos)) {
-            if isTermHole then
+            if isTerm then
               val quotedExpr = termHole match
                 case ExprHole.V1(evalHole) =>
                   evalHole.nn.apply(idx, reifyExprHoleV1Args(args), QuotesImpl())

compiler/src/dotty/tools/dotc/transform/TreeChecker.scala

@@ -658,15 +658,15 @@ object TreeChecker {
         super.typedPackageDef(tree)
 
     override def typedHole(tree: untpd.Hole, pt: Type)(using Context): Tree = {
-      val tree1 @ Hole(isTermHole, _, args, content, tpt) = super.typedHole(tree, pt): @unchecked
+      val tree1 @ Hole(isTerm, _, args, content, tpt) = super.typedHole(tree, pt): @unchecked
 
       // Check that we only add the captured type `T` instead of a more complex type like `List[T]`.
       // If we have `F[T]` with captured `F` and `T`, we should list `F` and `T` separately in the args.
       for arg <- args do
         assert(arg.isTerm || arg.tpe.isInstanceOf[TypeRef], "Expected TypeRef in Hole type args but got: " + arg.tpe)
 
       // Check result type of the hole
-      if isTermHole then assert(tpt.typeOpt <:< pt)
+      if isTerm then assert(tpt.typeOpt <:< pt)
       else assert(tpt.typeOpt =:= pt)
 
       // Check that the types of the args conform to the types of the contents of the hole
@@ -682,7 +682,7 @@ object TreeChecker {
         else defn.QuotedTypeClass.typeRef.appliedTo(arg.typeOpt.widenTermRefExpr)
       }
       val expectedResultType =
-        if isTermHole then defn.QuotedExprClass.typeRef.appliedTo(tpt.typeOpt)
+        if isTerm then defn.QuotedExprClass.typeRef.appliedTo(tpt.typeOpt)
         else defn.QuotedTypeClass.typeRef.appliedTo(tpt.typeOpt)
       val contextualResult =
         defn.FunctionOf(List(defn.QuotesClass.typeRef), expectedResultType, isContextual = true)